Estrogen excess occurs when estrogen levels are too high relative to progesterone. You may experience symptoms like mood swings, PMS, heavy periods, weight gain in the hips/thighs, and skin issues like acne.

Conversely, estrogen deficiency, a condition where there is insufficient estrogen in the body, can also cause hot flashes, night sweats, vaginal dryness, decreased libido, mood swings, and difficulties with concentration and memory.